Fly-fan



2 Sheets-Sheet 1.

{Nu Model.)

J. W. KIRKMAN.

FLY FAN.

Patented'Feb. 7, 1898.

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(No Model.) 2 Sheets-Sheet 2.

J. W. KIRKMAN. FLY FAN Patented Feb. "I, 1893..

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JAMES \V. KIRKMAN, 0F BALTIMORE, MARYLAND.

FLY-FAN.

SPECIFICATION forming part of Letters Patent No. 491,287, dated February 7, 1893.

Application filed February 4, 1892. Serial No.420,292. (N0 model.)

To aid whom it may concern;

Be it known that I, Janus W. KIRKMAN, a citizen of the United States, residing at Bal timore city, in the State of Maryland, have invented certain new and useful Improvements in Fly-Fans, of which the following is a specification.

This invention relates to an improvement in revolnble fans driven by a motor, and the object is to impart to a horizontal revoluble fan-carrying shaft an oscillatory motion.

To this end the invention consists in the novel construction and combinations of parts hereinafter described and claimed.

The invention is illustrated in the accompanying drawings in Which,

Figure l is a side elevation of a fiy-fan embodyin g my invention; Fig. 2 is a detail view, larger scale, of the revoluble part of the driving and oscillatory mechanism; Fig. 8 is a View of the upper end of the driving shaft; Fig. 4: is a top view of the stationary sector-Wheel supported on the case of the motor; Fig. 5 is a side view of same; Fig. 6 is a view of the driving and oscillatory mechanism in a position inverted from that shown in Figs; 1 and 2.

In carrying out my invention I employ suitable spring power clock-movement which is inclosed in a case, A, and mounted on an upright stem or rod, B. This motor revolves a vertical shaft, 0, the upper end of which has a suitable coupling, in the present instance consisting of a tube or sleeve, (2-, attached by a pin, p, or otherwise to the vertical shaft and having a cross-slot, b, and carrying a pivoted catch, 1); a short detachable section of shaft, C, has its end slipped into the said sleeve, (1, and a notch, c, on the side of this short piece of shaft coincides with the cross-slot, b, and receives the inwardpointing end of the pivoted catch, I). This coupling enables the revoluble part of the oscillatory mechanism to be detached from the vertical driving shaft. The lovver end of the shaft, 0, may extend through a tube, q, and is connected with the clock-movement or power. Suitable means, such as a thumb-button, I), serve for turning and Winding up the driving movement.

Supported by suitable posts, cl, above the case, A, is a circular horizontally disposed sector-wheel, E, which is stationary; this Wheel has gear-teeth on its upper face in three equidistant series of cogs, c, with clear spaces, e, between the series and in a lower plane than the said cogs.

The vertical shaft, 0, fits loosely through the central hole, f, of the stationary sector- Wheel and projects above the same; this shaft carries a cross-frame, F, which is rigidly secured to the shaft by a screw, h, and has depending bearings, g, at the middle and ends; a horizontal revoluble fan-shaft, G, extends longitudinally through these hearings and also loosely through a hole, 2', in the vertical shaft. On each side of the vertial shaft, 0, the fan-shaft carries a bevel pinion, H, which pinions are adjusted to engage the cogs, c, of the stationary sector-Wheel, E.

A fan, I, isfastened on each end of the horizontal shaft, G, and to facilitate packing the apparatus for shipment or carriage, the said shaft will be made in sections coupled together outside the frame, F, by means of socket and set-screw, j, so that when thus coupled the several sections form one continuous shaft.

By the construction as above set forth a firm and rigid support is provided for the sector Wheel and an equally firm support is secured for the fan shaft through the frame F, Without the latter coming in contact with the attachment for the former. If the frame F were below the sector wheel it would strike against the posts (Z and be prevented from rotating, hence the necessity of extending the shaft above the fan shaft. But as the fan shaft must be continuous, it is necessary that some means he provided by which the two shafts can cross each other without interfering with the rotation of the fan shaft. This is preferably accomplished by providing the shaft 0 with a hole "5 and passing the fan shaft G through the hole. In this manner the outer arms 9 of the frame F can be extended beyond the pinions H and form bearings for them, or rather for the shaft Which passes through them, which, together with the bearings in the inner arms and the hole through the shaft 0' gives a firm support for the fans and the shaft. Besides avoiding the interference of the frame F with the sector wheel E and its supports, the construction permits of the detachable union of the shaft 0 with the shaft C near the fan shaft which gives a very neat and compact form of device and it also permits of the ready detaching of the frame and the fans from the standard for packing and shipping, as all that is necessary is to lift the catch Z) out of the notch c and take the section 0 out of the sleeve a.

The operation is as follows:The springmotor is wound by turning the button, D, and continuous rotary motion is imparted to the vertical shaft, 0, which carries the crossframe, F, around above the sectorwheel. The two bevel pinions, H, on the fan-shaft alternately engage the cogs, e, of the sectorwheel; while one of said pinions is traveling over one series of cogs the other pinion is traveling over the diametrically opposite clear space, 0, and hence the fan-shaft is revolved or partly revolved in the direction of the said pinion which is in engagement with the cogs. Immediately upon said pinion leaving or disengaging the section of cogs, the pinion on the opposite side of the center or Vertical shaft enters into engagement with a section of cogs on the crown-wheel and consequently the revolution of the fan-shaft or partial revolution is reversed and the motion is positive in either direction. By this back and forward revolution the desired oscillatory motion of the fans is produced, while the shaft is continuously rotating in a horizontal plane.

Instead of the cog-gear shown it is obvious that well-known friction gear may be employed to produce the oscillatory motion. It is evident that with friction gear the operation will be the same as with the cog-gear construction.

The fans are rendered vertically adjustable by providing atubular standard, L, down into which the supporting stem or rod, B, enters and Which may be locked at the desired adjustment by means of a thumb-screw, 7a.

The combined oscillatory and rotary motion of the fans produces a flickering shadow that is very effective in dispersing flies.

A modification in, the mounting of this double motion fan is shown in Fig. 6; here it is shown pendent or suspended instead of supported on a base. A suitable bracket or hanger, M, supports the sector-wheel, E, and the vertical shaft, C, but instead of a spring motor to drive this shaft a pulley, n, is fixed to it and a belt, 0, connects therefrom with some source of rotary power. It will thus be seen that the double motion here described may be applied to fans for other purposes than merely driving flies.

It is evident that the mechanical structure of my improvement may be varied or changed in details without affecting the scope of my invention.

Having thus described my invention what I claim as new and desire to secure by Letters- Patent is:-

1. In a fly fan, the combination with the support, of a cross shaft journaled therein, and provided with means for continuously rotating said shaft in the plane of its length, and drivingmechanism forpositively rotating said shaft upon its axis, first in one direction and then in the opposite direction as it rotates in said plane, substantially as set forth.

2. In a fly fan, the combination with a standard the outer end of which is provided with a fixed wheel, a rotating shaft projecting through said wheel, a cross shaft, connected with said first mentioned shaft and continuously rotated thereby in the plane of its length above and parallel with said wheel, the cross-shaft being provided with means for engaging with the wheel and alternately rotating said shaft in its bearing as it is rotated above said wheel, and means for rotating the vertical shaft, substantially as set forth.

3. In a fly fan, the combination with a stationary plate or wheel the outer surface of which is circumferentially provided with multiple series of-cogs and smooth surfaces, the cogs projecting above the smooth portions, and each series being located diametrically opposite a smooth portion of the wheel, a shaft extending diametrically across said wheel in a plane parallel therewith and alternately engaging with the cogs upon opposite sides of the wheel, and means for continuously rotating said shaft in said plane, substantially as set forth.

4. In a fly fan, the combination with a standard the outer end of which is provided with a fixed plate or wheel, the outer surface of which is circumferentially provided with multiple series of cogs and smooth portions, the cogs projecting above the smooth portions and each series being located diametrically opposite a smooth portion, a shaft projecting through said wheel, a frame secured to the shaft and provided with arms, a cross shaft journaled in hearings in said arms and extending diametrically across said wheel, and rotated in a plane parallel with said wheel two pinions upon said shaft, one upon each side of the center of rotation thereof, said pinions alternately engaging with the cogs upon diametrically opposite sides of the wheel, an d alternately rotating the cross-shaft in opposite directions on its axis and means for rotating said first mentioned shaft, substantially as set forth.

5. In a fly fan, the combination with a standard, the outer end of which is provided with a wheel, the outer surface of which is provided with multiple series of raised and depressed portions, each raised portion located diametrically opposite a depressed portion, a rotatable shaft, the upper end of which is detachable and projects through the wheel and is provided with an opening and a notch, a frame secured to the detachable portion above the opening and provided with arms, a cross shaft joui'nalecl in hearings in the arms of the frame and through the opening of the detachable portion of the shaft, two pinions upon said horizontal shaft, one upon each side of the other shaft adapted to alternately engage with the raised portions upon diametrically opposite sides of the wheel, and I0 a fan secured to each end of the cross shaft,

substantially as set forth.

In testimony whereof I affix my signature in the presence of two witnesses.

JAMES W. KIRKMAN.

\Vitnesses:

G. ERNST REARDON, R. E. SOALLY. 

